Submission #1095988

#	Time	Username	Problem	Language	Result	Execution time	Memory
1095988		yoav_s	Dynamic Diameter (CEOI19_diameter)	C++17	7 / 100	133 ms	10972 KiB

diameter

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef vector<ll> v;
typedef vector<v> vv;
typedef vector<vv> vvv;
typedef pair<ll, ll> p;
typedef vector<p> vp;
typedef vector<vp> vvp;
typedef vector<vvp> vvvp;
typedef pair<ll, p> tri;
typedef vector<tri> vtri;
typedef vector<vtri> vvtri;
typedef vector<vvtri> vvvtri;
typedef vector<bool> vb;
typedef vector<vb> vvb;
typedef vector<vvb> vvvb;

#define f first
#define s second
#define pb push_back
#define eb emplace_back
#define all(v) (v).begin(),(v).end()

const ll INF = 1e18;
const ll mod = 1e9 + 7;

int main()
{
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
    ll n, q, w;
    cin >> n >> q >> w;
    vtri edges(n - 1);
    for (ll i = 0; i < n - 1; i++)
    {
        cin >> edges[i].s.f >> edges[i].s.s >> edges[i].f;
        edges[i].s.f--; edges[i].s.s--;
    }
    v weight(n - 1);
    for (ll i = 0; i < n - 1; i++) weight[i] = edges[i].f;
    multiset<ll,greater<ll>> weights;
    for (ll x: weight) weights.insert(x);
    ll last = 0;
    while (q--)
    {
        ll d, e;
        cin >> d >> e;
        d = (d + last) % (n - 1);
        e = (e + last) % w;
        weights.erase(weights.find(weight[d]));
        weight[d] = e;
        weights.insert(weight[d]);
        auto ptr = weights.begin();
        last = *ptr;
        if (n > 2)
        {
            ptr++;
            last += *ptr;
        }
        cout << last << "\n";
    }
    return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 13
• Subtask 3: 7 / 7
• Subtask 4: 0 / 18
• Subtask 5: 0 / 24
• Subtask 6: 0 / 27